Burner



FIG. 1 is a top perspective view of a burner, showing our new design;

FIG. 2 is a front view of our burner of FIG. 1, the rear view being a mirror image thereof;

FIG. 3 is a right side view of our burner of FIG. 1, the left side view being a mirror image thereof; and,

FIG. 4 is a bottom view of our burner of FIG. 1.

The broken lines shown form no part of the claimed burner design. 

The ornamental design for a burner, as shown and described. 